T4 requires TSH (Thyroid Stimulating Hormone) to make T3. If you're low in this it doesn't matter how much T4 you take. Or likewise if you use it all up it doesn't matter how much T4 you take.
T4 is a waste of time IMO.
T4 requires TSH (Thyroid Stimulating Hormone) to make T3. If you're low in this it doesn't matter how much T4 you take. Or likewise if you use it all up it doesn't matter how much T4 you take.
T4 is a waste of time IMO.
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